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Nor Flash

NaMo_1534561
New Contributor II

Hello,


Customers are considering replacing Micron's NOR-Flash (PC28F512M29EWL) with S29GL512S10FHI020.

At the Micron's footprint, F7 is defined as #BYTE, and the current board inputs 3.3V directly to the F7 pin.

The F7 pin of S29GL512S10FHI020 is defined as RFU. Does the IC work even if 3.3V is input here?
(RFU is described as not currently connected internally in the datasheet)

I understand that the recommended processing of RFU pins is unconnected and not used for PCB routing.
However, since the board cannot be changed in time, I would like to replace NOR Flash without changing the circuit.

If E7pin is used for other purposes in the future, can customers receive notifications such as PCN?

 

Micron's datasheet
https://media-www.micron.com/-/media/client/global/documents/products/data-sheet/nor-flash/parallel/...

 

Best Regards,

Naoaki Morimoto

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1 Solution
SudheeshK
Moderator
Moderator

Hello,

As mentioned in our datasheet, RFU pins are currently not connected to the die. We recommend to leave RFU pins unconnected on the PCB for future compatibility. As there is no connection with the die, it is OK to connect any other signals to the RFU pins. 

So, there won't be any issues if you connect 3.3V to the RFU pin, our device will work as expected. 

Yes, we inform our customers about the changes in our devices through PCNs.

Thanks and Regards,

Sudheesh

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2 Replies
SudheeshK
Moderator
Moderator

Hello,

As mentioned in our datasheet, RFU pins are currently not connected to the die. We recommend to leave RFU pins unconnected on the PCB for future compatibility. As there is no connection with the die, it is OK to connect any other signals to the RFU pins. 

So, there won't be any issues if you connect 3.3V to the RFU pin, our device will work as expected. 

Yes, we inform our customers about the changes in our devices through PCNs.

Thanks and Regards,

Sudheesh

View solution in original post

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NaMo_1534561
New Contributor II

Hello Sudheesh-san,

Thank you for your answer. My question has been resolved.

Best Regards,

Naoaki Morimoto

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